Kongens gate 1 is a two storey building in central Oslo, with a simple, rustic façade. Parts of the building date from the 1600s, and the complex was refurbished Arnstein Arneberg by the building in the 1920s. The choice of materials and colours is intended to create a fluid transition between the old and the new. Original wooden floors have been sanded and painted a warm grey, while the old timber ceiling has been painted ochre. All furniture was chosen with attention to modern standards of comfort and functionality. The garden, which includes a historic well, has also been rebuilt.